<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
        "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
    <title>jQuery克隆节点</title>
    <meta charset="utf-8">
    
    <style type="text/css">
        #one{
            background: red;
            width: 200px;
            height: 200px;
        }
        #two{
            background: green;
            width: 100px;
            height: 100px;
        }
    </style>
</head>
<body>
    <input type="button" id="emptyBtn" value="清空first"/>
    <input type="button" id="cloneBtn01" value="克隆first"/>
    <input type="button" id="cloneBtn02" value="克隆'清空first按钮'"/>
    <br><br>
    <div id="one">
        first
        <div id="two">second</div>
    </div>
</body>
</html>